if not intialized with capacity volume showed in disk management (computer management > disk management)
> initializing the drive
> you will see empty drive, don't do format yet*
> use recovery tools, like easus data recovery for lost partition or file
*if you click format, no hope to retry lost files...

if not intialized and no capacity volume showed in disk management (computer management > disk management)
> u can bring ur hdd to recovery center
> or throw it...